Bump configurate to 4.1.2

There is some considerations to provide 3 at runtime for plugins,
but, this is long overdue to align up with the rest of the ecosystem
here.

gradle/libs.versions.toml

@@ -1,5 +1,5 @@
 [versions]
-configurate = "3.7.3"
+configurate = "4.1.2"
 flare = "2.0.1"
 log4j = "2.20.0"
 netty = "4.1.100.Final"